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Home Offroad RC RPM B4 Front A-arms and Bulkhead

RPM B4 Front A-arms and Bulkhead

RPM Team Associated B4 A-Arms and BulkheadOwners of the Team Associated B4 line of off-road RC buggies have been asking for it and RPM delivers! Introducing the all new RPM Front A-arms and Bulkhead for the B4 buggy. Built to withstand serious off-road abuse, RPM redesigned the entire front end, replacing the stock front bulkhead with a version that helps spread impact forces over a larger area at the inner hinge pin mounts. The RPM front a-arms are wider at the inner hinge pin by nearly 3/16″ without alter geometry.

RPM also focused on the hinge pin retaining system used on the B4’s stock A-arms. Using a small screw hole so close to the hinge pin like the stock arms creates structural weaknesses. Instead they moved the hinge pin retaining screws in-line with the hinge pins, significantly strengthening the a-arms in the process. By eliminating the smaller 2-56 hinge pin retaining screws, they’ve also eliminated the problem of the hinge pins falling out due to varying screw head diameters.

Their final focus was on slop elimination. Strict quality control allows a tightening up of all tolerances without fear of binding the suspension system. The final result is a smooth, free moving suspension system with minimal slop.  These RPM a-arms will fit the Team Associated B4, B4.1 and B4.2 buggies.

RPM B4 A-arm Specs:

  • Availability: Late July
  • Part: 73732
  • Price: $15

RPM B4 A-arm Pictures:

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1 Comment  comments 

One Response

  1. Gen4

    I’m glad they finally released arms for the B4 but I don’t like that you are forced to use their bulkhead with them.

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